OH woops hehe, i thought the topic was particles, literally,like cells and stuff hehe...so i started on an atom, and then as i went to color it i saw the particles system,(clicked wrong tab) then i realized that the topic might be talking about the blender term for "particles"hehe...

I like it, the color of the sky is very nice, but I do have some crits..

I see great potential in your night sky. The scene is quite nicely set for some amazing astronomy. The white dots work, but you should probably make it more realistic, smaller stars, dimmer stars, etc.